<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8" />
		<title>Dra a blue rectangle (canvas version)</title>
	</head>
	<!-- 指定body加载完后的入口 -->
	<body onload="main()">
		<!-- 定义一个canvas -->
		<canvas id="example" width="400" height="400">
			Please user a browser that supports "canvas"
		</canvas>
		<!-- 加载一个js文件 -->
		<script src="DrawRectangle.js"></script>
	</body>
</html>
